Security Experts:

Payment Card Skimmer Found on Macy's Website

Macy’s has started informing some of its customers that their personal and financial information may have been stolen by cybercriminals.

According to the company, it noticed on October 15 that there had been a suspicious connection between macys.com and another website. An investigation revealed that malicious code had been added to the checkout page and the My Account wallet page on macys.com.

The malicious code was designed to capture information entered by customers on the desktop version of the Macy’s website and send it back to a server controlled by the hackers. The mobile application and mobile website were not impacted, Macy’s said.

The attackers may have obtained information such as full name, address, city, state, zip code, phone number, email address, payment card number, card security code, and card expiration date, if the information was provided by the customer on the checkout page or the My Account wallet page.

Macy’s claims the malicious code was only present on its website between October 7 and October 15. The company has notified law enforcement and it has called in a forensics firm to help investigate the incident.

The retailer says it has also alerted payment card issuers and it has taken steps to prevent such incidents in the future. It has also decided to cover the cost of identity protection services for a period of 12 months for affected customers.

The company also appears to be concerned that information stolen as a result of the breach may be used for phishing, vishing and smishing, and it has warned customers of the possibility that cybercriminals may try to obtain their passwords or security question answers through these methods.

Based on Macy’s description of the attack, it has all the hallmarks of a Magecart operation. An anonymous researcher told BleepingComputer that this was in fact a Magecart attack, but the expert has not linked it to any of the several groups known to have conducted these types of campaigns.

While some Magecart attacks target online shops directly, others target companies that provide services to thousands of shops. One example involves ecommerce platform provider Volusion, through which a Magecart group recently targeted thousands of shops.

Macy’s informed customers last year that their information may have been stolen after hackers accessed their profiles on macys.com and bloomingdales.com using credentials leaked as a result of breaches at other companies. These credential stuffing attacks have been increasingly common in the past few years and they rely on the fact that many individuals use the same username and password combination across several online services.

Related: Historical Breadcrumbs Link Magecart 5 to Carbanak Group

Related: Magecart Hackers Target Mobile Users of Hotel Websites

Related: Magecart Hackers Target L7 Routers

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Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.